The Internet Movie Database (IMDB) is my go-to site for figuring out “who is that guy?” when I watch TV and movies. The site contains profiles for nearly every movie and television episode produced, cross-referencing the cast lists with the filmographies of every actor in film and TV history.
The site also allows users to rate movies on a scale from 1 to 10. Except This is Spinal Tap (1984). The scale for that film goes up to 11. You can only rate it up to 10, but the scale goes up to 11.
If you don’t get the joke (or just want to watch the scene again), check out this clip from the movie: